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Finding the Fourth Proportional to 377.96, 521.28 and 253.58

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Solution

The fourth proportional to 377.96, 521.28 and 253.58 is: 349.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.96 : 521.28 = 253.58 : x
  2. Step 2: Convert to fraction form
    377.96/521.28 = 253.58/x
  3. Step 3: Cross multiply
    377.96x = 521.28 × 253.58
  4. Step 4: Simplify right side
    377.96x = 132,186.18
  5. Step 5: Solve for x
    x = 132,186.18/377.96
  6. Step 6: Final answer
    x = 349.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.